生产过程资源环境属性综合评价支持系统

针对生产过程资源环境属性评价研究中缺乏实用方法和工具的问题,开发了一种制造企业生产过程资源环境属性综合评价支持系统.该系统主要由资源环境属性分析模块、资源环境属性评价模块、生产过程优化模块,以及支撑数据库和模型库模块等组成.在数据库和模型库等的支持下,对生产过程中的原材料消耗、辅助原材料消耗、能最消耗和环境排放物等进行综合评价,诊断生产过程中资源消耗和严重影响环境的关键工艺和过程,并辅助工艺人员改善和优化生产过程的绿色性.通过在某机床厂齿轮生产过程中的应用,验证了该系统的可行性.     

面向绿色制造的工艺规划关键技术研究

绿色制造工艺规划是绿色制造的关键之一,是一种对工艺要素、工艺过程及工艺方案绿色性评价等进行优化决策和规划,从而达到减少产品制造过程中的资源消耗和环境影响的工艺规划方法。     

基于Web的绿色制造工艺规划

根据绿色制造的目标,对产品绿色制造工艺规划进行了分析,确立了面向绿色制造工艺规划的决策目标体系.通过设置变量建立并优化决策目标函数,在此基础上建立了决策模型,并采用多目标体系的模糊综合评价法求其最优解.同时根据工艺规划的复杂性和多目标性,建立了绿色工艺数据库,采用JavaBean技术和JSP(Java Server Page)语言,开发了基于Web服务器Browse/Sever(B/S)模式的三层分布式结构的绿色制造工艺规划系统,用户从浏览器登录到该系统,在数据库的支持下,实现网上规划工艺方案,并对其进行绿色性评价.     

面向绿色制造的机械加工系统任务优化调度模型

机械加工系统是车间层实施绿色制造的主体之一,对加工任务进行优化调度可以减少机械加工系统所产生的环境影响和资源消耗,是改善机械加工系统绿色性(即资源消耗和环境影响特性)的途径之一.基于此对面向绿色制造的机械加工系统任务优化调度问题进行研究,构建其框图模型及数学模型,该模型能对调度问题的整个优化调度过程及所涉及的各种要素之间关系进行描述.结合机械加工系统的资源消耗和环境影响特性,建立该模型的目标体系,该体系包括优化调度问题所涉及的各个子目标,并对子目标的内容进行描述.最后通过案例,对面向绿色制造的机械加工系统任务优化调度模型进行应用分析.     

机械加工工艺过程资源环境属性清单分析与评价

根据机械加工工艺过程资源环境属性,分析了制造工艺过程清单分析步骤,并基于工艺的IPO过程模型,详细描述了清单分析评价指标建立过程与数据获取、评价方法。根据上述步骤和评价方法,建立了某刨削工艺清单分析表,综合评价该工艺的绿色性,从而为改善其资源消耗和环境影响提供依据。     

绿色制造工艺优化的物元可拓评价

绿色制造工艺规划要考虑到制造过程中的环境影响和资源消耗,其评价模型不易建立、评价计算过程繁杂。基于生命周期评价方法,运用人工智能技术中的物元理论,建立各工艺流程的物元模型,采用层次分析法确定影响工艺决策诸因素的权重,通过可拓关联度计算,对几种绿色制造工艺流程进行优化排序,求得最佳的制造工艺。     

面向绿色制造的工艺种类选择及参数优化

绿色工艺规划是实施绿色制造的重要环节,而工艺种类选择是绿色制造工艺规划的首要内容,在对TQCRE(time、quality、cost、resources、enviroment effect)分析的基础上提出了面向绿色制造工艺种类选择的总体要求和五项基本原则,以及种类选择的模糊评判方法,建立了评价指标体系和评价矩阵,并提出了工艺参数优化的数学模型及研究方法,通过数据库设计、软件开发对模糊评判方法和工艺参数优化开发了友好软件操作界面,最终实现了工艺参数优化的最优方案选择。     

基于模型集的面向绿色制造工艺规划策略研究

分析了制造过程的输入，输出，揭示了面向绿色制造工艺规划的内涵，建立了面向绿色制造的工艺规划多目标优化决策总体模型，通过对该模型的分解，构造出面向绿色制造的工艺规划模型集，基于研究建立了一种基于模型集的面向绿色制造工艺规划策略，并开发了相应的面向绿色制造工艺规划的应用支持原型系统。     

面向绿色制造的工艺规划数据库系统研究

绿色制造是一种综合考虑环境影响和资源消耗的现代制造模式。面向绿色制造的工艺规划是绿色制造研究的关键技术之一，如何有效地为绿色制造工艺规划的实施提供必要的信息支撑是目前研究的难点之一。运用绿色制造的思想，构建了面向绿色制造的工艺规划数据库系统，提出了一种具有分布式存储和处理数据以及便于扩充的B／S体系结构，并详细阐述了该数据库系统的组成及其绿色特性、数据库系统开发的关键技术。结合一案例对构建的数据库系统的结构和功能进行了应用，对其可行性进行了验证。     

制造信息系统仿真模型规划

制造信息系统是一个复杂系统,基于复杂性思维对系统演化模型的运行和评价过程进行了研究,建立了制造信息系统的仿真及评价模型体系,该模型体系包含仿真运行子系统、评价与预测子系统和IT规划子系统.模型的建立有利于系统的优化、设计和实施,具有协助制造企业对生产运作流程优化、实现生产过程的信息管理和监控一体化、辅助制造业信息系统的建设规划等功能,以使相应的制造企业能在市场竞争中取得发展.     

Process Planning Support System for Green Manufacturing and its application

Owing to a lack of practical methods and software tools in the existing researches on green manufacturing (GM), process planning support system for green manufacturing (GMPPSS) was developed to deal with the problems in optimization of environment-benign process planning. The GMPPSS consisted mainly of three function modules and related model repositories including: selection of process elements, optimization of process courses, and evaluation of process projects for GM. The database of the GMPPSS was used to provide plentiful information on resources consumption and environmental impact in manufacturing processes, which consisted of process attribute database, inventory database, machine database, tool database, and the cutting fluid database. Raw materials, secondary material consumption, energy consumption, and environment impacts of process planning were optimized to improve the green attribute of process planning of parts with the supports of the databases and model repositories. The gear processing in the machining tool factory was presented to verify the system’s applicability. __________ Translated from Computer Integrated Manufacturing System, 2005, 11(7): 975–980 [译自: 计算机集成制造系统]     

绿色工艺规划的决策模型及应用案例研究

绿色工艺规划是绿色制造的重要组成部分,绿色工艺规划问题实质上是一个决策问题。在绿色制造决策框架模型研究的基础上,从绿色工艺规划的目标体系模型、绿色工艺规划问题的决策变量描述出发,建立了绿色工艺规划的决策模型,并在一个生产实际的工艺规划问题成功地进行了应用。     

Experimental and numerical true strain assessment on sheet forming for different tool design

The forming tests are being developed with the purpose of enabling forming companies to better understand the sheets formability. The identification of the regions where tension-tension, tension-compression, and/or plane strain occurred during the forming process can aid the process planning through the tools geometry optimization. This work consisted of evaluating, experimental and numerically, the major true strain obtained with different punch designs, which were used in addition to the traditional Nakazima test tool. The main objective was to study the true strain profile as an alternative method to analyze the tool design influence on stretching forming of high stampability steels (DC 06). The friction coefficient was investigated, and an evaluation was also made of the chosen program's response quality (validation). The results are given as a major true strain distribution profile at points distributed linearly from the region close to the die radius to the punch pole. The result expectation is to help the process planning and the material evaluation based on the correct tool design specification in order to obtain the desired true strain distribution in the formed part.     

Study of machining parameters optimization for different materials in WEDM

In process planning of wire electrical discharge machining (WEDM), determination of appropriate machining conditions is likely to face problems in many ways. In addition to the construction of the relationship between machining parameters and machining characteristics, optimization search technique, a large number of experiments must be conducted repeatedly to renew parameters for different workpiece materials. The concept of specific discharge energy (SDE) was employed in this paper to represent the WEDM property of workpiece materials as one of the machining parameters. Two kinds of materials with distinctive SDE values, i.e., higher and lower, respectively, were selected for our experiments. The experimental data obtained were used, and a neural network that can accurately predict the relationship between machining parameters and machining characteristics was constructed. It was found that the predicted error was less than 7 %. The optimization technique of genetic algorithms was employed, and the optimal combination of machining parameters that meet the required machining characteristics for different workpiece materials was obtained. The system proposed in this study is both user-friendly and practical. It can save considerable time and cost during the construction of the database for the expert system of process planning.     

基于工艺约束的生命周期评价与生命周期成本综合评价与优化

为实现环境效益与经济效益的最大化,研究了产品生命周期的制造阶段中生命周期评价与生命周期成本的整合与优化问题.在建立制造阶段整合评价模型的基础上,提出了基于工艺约束的工艺方案优化模型,在获得最优工艺方案的同时,也获得了环境属性、经济属性和技术属性的综合效益最优.最后,通过对4135G型柴油发动机的案例研究,验证了预期的效果.     

基于STEP-NC的在线工艺规划及刀具路径生成

为了使AP238文件能直接应用于基于PMAC的开放式数控系统中,在进一步研究分析AP238文件信息结构和STEP-NC解释器的基础上,提出了在线工艺规划方法及刀具路径生成方法.首先概述了AP238文件的信息模型和STEP-NC解释器的信息提取原理,在比较离线工艺规划和在线工艺规划的基础上,选定了在线工艺规划的内容,然后...     

基于网络的难加工材料高速切削数据库系统的研究与开发

难加工材料的高速切削数据库系统主要是通过对加工实例进行分析归纳,收集和分析概括高速切削用量参数,并通过制作加工动画模拟,以Web形式为难加工材料的高速切削加工提供一定的参考,同时建立查询系统,方便查询优化后的高速切削参数,提高切削效率.     

A production planning in highly automated manufacturing system considering multiple process plans with different energy requirements

This paper focuses on a production planning problem in a highly automated manufacturing system considering multiple process plans with different energy requirements. The system consists of several closely interconnected sub-systems such as the processing system, the material (part) handling system, the tool transport system and the auxiliary system responsible for a supply of cooling/lubricants and a waste disposal. We propose a methodology for an estimation of energy consumption and material flows that are incurred at a system level with respect to multiple process plans for a part type. In addition, this study focuses on a production planning problem with the objective to minimize the weighted sum of energy consumption, inventory holding cost and backorder cost on a FMS considering multiple process plans. The production planning model is developed as a linear programming model. The benefit coming from the adoption of suggested model has been addressed with reference to a real industrial use case study.